#1
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Lakeroadster's Fin Alignment Guide
I decided to take a crack at making a fin alignment guide.
My design is basically the same as TRF Memeber qquake2k with the exception of being double sided. One Side is for BT-60 thru T-400 tubes, the other is for BT-20 thru BT-55 tubes. Here's the CAD drawings:
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John Simmons a.k.a. "Lakeroadster" NAR 113985 My Fleet with Build Data: Lakeroadster's Rocket Shop |
#2
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Armed with the drawings I headed out to the barn to make some sawdust. I changed the design a bit, making 4 longer legs for the base.
I mocked up the parts for a visual representation... once the glue dries and I get a couple carriage bolts, I'll post up some more photos.
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John Simmons a.k.a. "Lakeroadster" NAR 113985 My Fleet with Build Data: Lakeroadster's Rocket Shop |
#3
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Here's the finished jig / fixture.
I ended up using 3/8" dia. x 3-1/2" Carriage Bolts, washers and wing nuts. The wing nuts were $2.48 each? :facepalm: For the mock up photos l used a piece of BT-60 and a left over plywood fin from my Spad Ace build, and that's a BT-50H for the smaller tube.
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John Simmons a.k.a. "Lakeroadster" NAR 113985 My Fleet with Build Data: Lakeroadster's Rocket Shop |
#4
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You do some great custom work, John. I appreciate you sharing your builds here with the other members of YORF!
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Scott D. Hansen Ye Olde Rocket Shoppe - Your One Stop BAR Shoppe! Ye Olde Rocket Plans - OOP Rocket Plans From 38 Companies! Ye Olde Rocket Forum WOOSH NAR Section #558 |
#5
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Quote:
Thanks, yorf certainly welcome
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John Simmons a.k.a. "Lakeroadster" NAR 113985 My Fleet with Build Data: Lakeroadster's Rocket Shop |
#6
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Question
Looking at the end view with the miters (sht 5) On the right side, if the miter was 30 deg instead of 45, do you think it would support a 4 fin rocket? This would shorten the "body" of the board to be further from the tube. And/or route down the thickness on that side? |
#7
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Quote:
30 degrees would make the body tube very close to the fixture...
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John Simmons a.k.a. "Lakeroadster" NAR 113985 My Fleet with Build Data: Lakeroadster's Rocket Shop |
#8
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I played with the angle in AutoCAD with various tube sizes and decided that I liked 40 degrees the best.
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#9
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Quote:
If 40 works... so will 45.
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John Simmons a.k.a. "Lakeroadster" NAR 113985 My Fleet with Build Data: Lakeroadster's Rocket Shop |
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